Using the description provided for obtaining elastic constants from the speed of sound in various directions of a cubic crystal, in Chapter 3 section Elastic Waves in Cubic Crystals. Determine the three independent elastic constants of diamond, namely, C11, C12, and C44 with the following data obtained from experiments. Data: The density of diamond is 3.52 g/cm3 The longitudinal and transverse speeds of sound along the [100] direction are 17.6 and 12.8 km/s And The longitudinal speed of sound in the direction [111] is 18.6 km/s. Calculate the elastic constants in gigapascal (GPa).

b. latent learning (the word "latent" itself means something that exists but isn't obvious, only under certain conditions! )

hypothesising or postulating

answer would be letter choice (a),   a ball resting on a shelf. would be another example of potential energy   >   stored energy > not moving.

a ball spinning on a finger   >   kinetic energy > moving energy

a ball rolling on the ground   >   kinetic energy   > moving energy

a   ball flying through the air   > kinetic energy   >   moving energy

hope that                                         : )

  distance on the y-axis and time on the x-axis.

explanation:

the instantaneous velocity = change in position/time taken

the slope of the graph should give instantaneous velocity.

  slope of a graph = change in value of y -axis / change in values of x -axis

  comparing both the equations

    change in value of y -axis = change in position

  change in values of x -axis = time taken

so position values should be on the y axis and time values should be on the x axis.

distance on the y-axis and time on the x-axis.